Removable saddle for fixed dental bridges.



A. L. VAN ARSDALL.

REMOVABLE SADDLE FOR FIXED DENTAL BRIDGES.

APPLICATION FILED APR. 28, 1913.

1,09 1 A46, Patented Mar. 24, 191i Zuz Cngsscs. qhas; 2 fl A F iters fii illfit its m s 7 I a i: o salte i @Fltiltlh ALEXANDER ABSDALL, O33 KANSAS CITY, MISSOURI.

REIEIG'ZEQBLE CfiADDLE FOR FIXED DENTAL BRIDGES.

vi,GillA1455. Specifieation of Letters Patent Patented Mar. 24, 1912 4. Application filed April 28, 1913. Serial No. 784,103.

g}; 5mg 3 v H sectional View of the lug. Fig. 10. is a detail, enlarged View of the fastening screw for the lug. Fig: i1. is a view in perspective of the saddle, out from the wax model 1;, shown in Figs. 3 and 5. Fig. is a View in perspective of the saddle, with the lug selie i v ror Fixed Dental Bridges, cured thereto. l ig. 13. is a transverse, verot fl'llllli the following is a. specincation. tical, sectional view, taken on the line y,

My intention has for its object the term: on Fig. Fig. 1 1-. is an inverted View of 5 1e tier. re: saddle of cold or other the cast dunnny, showing the depression for the saddle retainer. i The teeth to which all fixed bridge work time. and re-adjus so as to keep the is anchored in dental practice, consists of saddle in proper relation to the alveolar such as are provided with artificial crowns 70 and thereby improve the sanitary or ast inlay fillings, these forming on each of the bridge work, or the saddle side of the intervening space on the alveolar v he removed for the treatment of gum ridge, from which the natural teeth have s such as pyorrhea, Without disturbbeen extracted anchorages for the completed l structure. bridge. (See Fig. l.) i A wax dummy is 5 n "*11 consists in the novel parts then formed between the aforesaid anchorl he first fully described and then ages 15 and 18, and given the proper shape iin'l'ed out in the claims. and form. Previous to the making of the i. liaiwings, to which reference is wax dunnny, I make a retainer, as seen at now made, and in which like characters of 90, in Fig. 6, and in cross-section in 7, go reference indicate corresponding parts: l igfor the removable saddle further described, ure 1 is a broken view of cast of a maxilla, the retainer being made from suitable 1nahuman jaw, taken from the lingual side terial, in the main preferably from gold. alveolar process, with the intervening This retainer, seen in Fig. (3, consists of h shown ectween the first molar and cos a single casting, constituting a receptacle or which in the natural teeth form the ansocket-piece, and as shown is rectangular in work. 2 is a form, having a top plate 21, abottom plate ie east of e maxilla, as 9'3, end plates '23. and a closed forward side wing the dummy formed plate Qt. which is inclined downwardly and the removable ()lttfl't'llt'll), at an angle tothe upper surface i was dummy. Fig. of the top plate 21., the adjoining portions v, the east of the maxilla, of the end plates 93 being also inclined at the dummy and 72%, in like manner. the secured in posi- At the rear portion of the frame, the side wing, and "ne lug in position in that direction left open, and extend- 5 or retainer, shaming the wax ing inwardly through the bottom plate 29, arable saddle in position. of said retainer or socket, is an opening 525, of the ast of the maxilla, which extends to the line of the inner sur- 3, showing the completed face of the front plate Q-l anti to within short ured to the removable saddistances oi the lines of the inner surfaces le in ,on the alveof the ends 23, leaving shelf portions 248. i s a transi'e 5. i I rse, vertical, Through the adjoining portion of the top the cast of the Tl12'tX1l.l 1,El$ plate 21 and. the forward side plate 24, on on the line at, on said at a point intermediate the end plates 23,

View 7 seen in Fla. at, ml: 7 figarmshowin the removable saddle secured is made a small opening 26, To the outer" 59 to the duimnr, also showing; in full l nes the surface of said portions of the top-plate 21 porcelain 3 l .lJie: 6. is a View in perand side plate 242 is rigidly connected, by SPBCUYE: or the novel retainer for the saddle. soldering or other suitable means, the nut r 1 w- I, N f lh TT-W OH n L: I I, lfy t 1 f t] t and i 1g. 5. 1s a 1155 sectoi t eieov. li at, composer o a (1-!Joll me a rom na 8. a VIEW in perspective of the perforate composing the socket or retainer 20, and

lo for the saddle, whlch enters the socket preteraoly of irldw-platinuin or gold alor retainer 5 e. n'Flg. '0, fig. V9 1.8 erossloyed with irldioplatinum.

, tance to the line of the inner surface of the I The inner portion of the nut is \!shaped and is fitted to the outer contacting surface of the said top plate 21 and the side plate 24, and having an internal screw-threaded opening 27, extending around the opening 26, the nut extending a slight distance outwardly, and at an angle to the top plate 21, of said socket or retainer.

A lug 30, as seen in Fig. 8, and in crosssection in Fig. 9, is made or cast from suitable material, preferably from gold, of the size and shape to; fit and slide within the opening in the retainer, between the inner surfaces of the ends 23, and upon the shelf portion 24*, of the bottom plate 22, of said socket or retainer, and extends the full disfront plate 24. The upper surface 31, of the lug 30, is downwardly inclined, and the lower surface at the ends provided with rabbets 32, which receive and slide upon the shelf-portions 24*, of the bottom plate 22, of the socket or retainer.

The central portion 34 extends downwardly, a considerable distance below the line of the rabbets 32, and forwardly in a llOIlIiOIltEll line, the lower surface of the lug 30 being curved or rounded laterally. In the said central portion 34, of the lug, is a cone-shaped opening 35, extending forwardly and through the upper portion of the lug 80, the opening terminating m; wardly in a shoulder 37 (see Fig. 9).

The lug 30 is secured at the proper time within the socket 20, by means of a screw 38, having a cone-shaped body or head 39, provided with a nick 40, in its outer end, the cone-shaped portion being fitted to the opening 35, in the lug 30, and the screw 38 fitted to the screw threaded opening 27*, of the nut 27.

After making the wax dummy heretofore referred to, between the anchorages 15 and 18, the wax dummy is removed from the cast 14, anda slot is made in the palatal side of said wax dummy (see Fig. 14), and the retainer is fitted within said slot with the rear or outer surface of the retainer flush with the palatal surfaces of the wax dummy (see Fig. 13), so that the wax dummy with the retainer when returned to cast 14, will appear as in Fig. 2. The wax dummy is removed from the cast 14, and the retainer 30 is removed from the wax dummy.

The wax dummy is now cast by any of the common methods of casting. The retainer 20 is then placed in position in the cast dummy 19, and soldered thereto. The dummy the cast 14, and the lug 3O placed within the retainer 20, and the removable saddle formed in wax from an impression made of the cavity beneath the dummy, seen in Fig.

13. The wax form of the saddle is then removed from the cavity, and cast froml I is then placed in proper position on i gold. The lug 30 is then soldered to the saddle 41, as seen in Fig. 12. The dummy piece 19, with the completed removable saddle, as seen in Fig. 12 in position, is then replaced on the cast 14, between the anchorages 15 and 18, and the dummy soldered to the crown 15 and inlay 18, the dummy, crown and inlay forming what is termed the dental bridge, which is now fitted to the maxilla of the patient.

In case the saddle, thus made, impinges on the alveolar ridge and causes irritation or pain, the saddle may be removed, and the part causing the trouble ground off. In time, as the resorptive process of the alveolar ridge progresses, and it is necessary to readjust the saddle to the alveolar ridge, the saddle may be removed and castin wax placed in position on the saddle and ormed to suit the conditions which may exist.

This wax form and the saddle may be in vested, as before stated, and gold cast uniting the saddle, or the additional part may be cast separate and soldered on to the saddle and the saddle returned to its place in the bridge.

Instead of casting the saddle, a metal die may be made from an impression of the space between the dummy and the alveolar ridge, and the saddle swaged, and the swaged saddle placed in position and soldered to lug 30.

The retainer, lug and screw are of such form and construction as to admit of universal application and be conformed to the contour of natural teeth. The purpose of the iridio platinum nut 27 is to afford rigidity of threads for holding the screw, and which remain unaffected by the high degrees of heat in the casting orisoldering procedure. Instead of using gold in the making of the saddle, other material suitable for the purpose may be employed.

Such modifications may be employed as are within the scope of the appended claims.

Having fully described my invention, what I new claim as new and desire to secure by Letters Patent is:

1. In fixed dental bridge construction, the combination with the bridge structure of a removable saddle adapted to be adjusted to the alveolar ridge, and means for attaching the saddle to the bridge structure.

2. In dental bridge construction, the means herein described for closing the aperture between the bridge and the alveolar ridge, comprising a saddle adapted to be adjusted to the alveolar ridge, a socket piece on the bridge, and a lug fitting said socket secured to the saddle.

3. In attachments for removable saddles for fixed dental bridges, a socket piece having top and bottomand end members, and a forward side member arranged at an angle to the said top and bottom members, and a nut secured to the socket piece, said bottom member having an opening extendsaid member having an opening leading to the said nut, and said bottom member having an opening, and sides to said opening extending in the direction of the said forward 15 side member, and a lug fitted to said socket piece.

ALEXANDER L. VAN ARSDALL.

Witnesses:

D. C. COLLIED, ANNIE L. GREEK. 

